Show concealed edges in a cross section elevation
Choose the elevation type that always draws concealed edges so a cabinet cut shows parts like back panels.
In a regular sectional elevation, edges hidden behind other faces (concealed edges) are not drawn, because showing them would make the front view unreadable.
A separate elevation type exists that always shows concealed edges.
Use that type when a cut through a cabinet must display parts such as back panels that would otherwise be hidden.